Vulnerability in Keycloak
CVE-2025-11538
A vulnerability exists in Keycloak's server distribution where enabling debug mode (--debug <port>) insecurely defaults to binding the Java Debug Wire Protocol (JDWP) port to all network interfaces (0.0.0.0). This exposes the debug port to the local network, allowing an attacker on the same network segment to attach a remote debugger and achieve remote code execution within the Keycloak Java virtual machine.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Keycloak — versions 0
- Red Hat Build Of Keycloak 26.4 — versions 26.4.4-1, 26.4-3
- Red Hat Build Of Keycloak 26.4.4
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2025:21370 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:21371 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2025-11538 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- github.com/keycloak/keycloak/commit/9e98f2bf961f68853cea6fbec58b512ed8be7ca9
- github.com/keycloak/keycloak/pull/43574
Frequently asked questions
- What is CVE-2025-11538?
- CVE-2025-11538 is a medium-severity vulnerability in Keycloak, classified under CWE-1327. CVSS score: 6.8/10. Published 2025-11-13.
- How severe is CVE-2025-11538?
- Medium severity. CVSS v3 base score is 6.8 out of 10.